The power supply we will be looking at is the B620JL, which is a 620 watt unit from their gaming line. The unit is Bronze rated meaning it has at a minimum 80% efficiency rating at 20% and 100% and at 50% an efficiency level of 85%. At the moment Jou Jye have a power supply above this level. The B620JL has one feature that makes it different from many of the other units on the market and that is connecting two or more of them for twice the power.